Daniel Mitchell Key Takeaways
- Bertazzoni dishwashers are built on ASKO Swedish-engineered platforms — the DW24PR and DW24XT use a tri-filter system that must be cleaned regularly.
- Error codes E1 and E4 indicate water-level and drain faults respectively; F2 points to a pump or motor circuit issue.
- A new dishwasher installation that won't drain often has a capped garbage disposal knockout that was never removed.
- Standing water after every cycle that clears after a forced drain cycle usually means a slow drain hose — not a pump failure.
- A drain pump that hums but doesn't move water has likely ingested a bone chip or glass shard that is jamming the impeller.
- The E3 code on DW24 models indicates a heating element fault that can cause shortened drain cycles and apparent standing water.
The Bottom Line
Most Bertazzoni dishwasher drain failures are resolved by cleaning the tri-filter assembly and clearing the drain hose; error code E4 that persists after cleaning points to a drain pump impeller jam or motor failure requiring a technician.
What's Happening with Your Bertazzoni Dishwasher?
Bertazzoni dishwashers — including the DW24PR and DW24XT models — are built on ASKO's Swedish-engineered platform and use a tri-filter system at the base of the wash tub to protect the drain pump from debris. When the drain cycle runs, the drain pump pulls water through the filter assembly and out through the drain hose to the household drain. Standing water after the cycle ends means that process was interrupted at one of these stages. The most useful first step is checking whether the dishwasher is displaying a fault code: the E1 code flags a water-level or fill fault, E4 indicates a drain fault, E3 points to a heating element issue, and F2 points to a pump or motor circuit problem. Each code meaningfully narrows the diagnosis before a technician is needed.
Common Causes
- Clogged tri-filter assembly: Food debris, grease, and mineral deposits accumulate in the coarse filter and fine mesh filter over weeks of use, restricting water flow to the drain pump and leaving standing water in the tub after cycles.
- Blocked or kinked drain hose: The corrugated drain hose can kink behind the unit during installation or after the dishwasher is slid back in, slowing drainage to the point where the pump can't fully empty the tub within the cycle time.
- Uncapped garbage disposal knockout: On new installations connected to a garbage disposal, the knockout plug inside the disposal inlet must be removed before the dishwasher drain hose is connected. If left in place, water has nowhere to drain and will back up into the tub.
- Drain pump impeller jam: A bone chip, broken glass shard, or cherry pit can lodge in the pump impeller, causing the motor to hum without moving water — or triggering the F2 code and shutting the pump off on overload protection.
- Failed drain pump motor: After years of use, the drain pump motor winding can fail, producing no drain movement and no motor sound at all when the drain cycle activates.
- Check valve failure: The drain hose check valve prevents drained water from siphoning back into the tub. A stuck-open check valve allows drained water to return between cycles, giving the appearance of a drain failure even when the pump is working correctly.
What You Can Check Yourself
- Clean the filter assembly: Twist out the cylindrical filter at the tub base and remove the flat mesh filter beneath it. Rinse both under warm running water with a soft brush, paying attention to the mesh perforations. Reassemble and run a short rinse cycle to test drainage before assuming a pump problem.
- Inspect the drain hose: Carefully pull the dishwasher forward to access the drain hose run. Trace the hose from the pump outlet to the sink drain or disposal inlet and remove any visible kinks. Confirm the hose has a high loop installed at least 20 inches above the floor, or an air gap fitting, to prevent back-siphoning.
- Check the garbage disposal connection: If the dishwasher was recently installed, turn off the disposal and inspect the inlet port where the drain hose connects. The plastic knockout plug should be absent — if present, knock it out with a screwdriver and remove all plastic pieces from the disposal chamber before running the dishwasher.
- Run a forced drain cycle: Many DW24PR and DW24XT models allow you to initiate a drain-only cycle by pressing and holding the cancel button for three seconds. If the machine drains when manually forced but leaves water after a normal cycle, the issue is likely a slow drain hose rather than a failed pump.
Bertazzoni-Specific Diagnostic Steps
On the DW24PR and DW24XT, the tri-filter system uses a bayonet-lock cylindrical filter — turn counterclockwise a quarter-turn to remove rather than lifting straight up. A common service-call finding is a fine mesh filter that has been cleaned but not fully reseated, allowing debris to bypass the filter and reach the pump. If the E8 code appears alongside the drain complaint, this indicates a turbidity or flow sensor fault that can be caused by a damaged filter mesh. The F7 code points to a heating circuit fault that sometimes causes the control board to abort cycles early, resulting in apparent drain issues when the real problem is in the wash heating system.
When to Call a Bertazzoni Technician
If the filter is clean, the hose is clear, and the E4 or F2 code returns after a power reset, the drain pump impeller is likely jammed or the motor has failed. Accessing the drain pump on the DW24PR and DW24XT requires removing the lower spray arm assembly and the tub base panel — manageable but detailed work without the service manual and the correct torx bit set. A technician can clear an impeller jam, test motor winding resistance at the pump terminals, and replace the pump assembly if the motor has failed. They can also confirm whether an E1 water-level code is caused by a faulty pressure sensor or a fill valve that's allowing residual water to return to the tub during the drain phase, producing a fill-fault code from a drain-origin problem.
What to Tell Your Technician
Locate your DW24PR or DW24XT model number and serial number on the inner door frame, visible when the door is open. Tell the technician: the exact error code displayed, whether the standing water is present after every cycle or only after longer cycles, and whether you can hear the drain pump activate at the end of the cycle. Note whether the water level is consistent (always the same depth) or variable — consistent depth points to the check valve or a hose issue, while variable depth suggests a partially failing pump that drains some water but not all.